properties of water

Question 1

why are organisms so adapted to the sea

Answer 1

its where life began - long time

Question 2

what are the environmental factors like

Answer 2

extrene - even today in tide pools

Question 3

what is acclimation? conformers vs regulators

Answer 3

• Concept of acclimation: org. adjusts to change in environment
Regulators (maintain levels) versus conformers (change with environment)

Question 4

how can we measyre environmental effects use

Answer 4

To measure environmental effects use : scope for
growth (difference between energy assimilated & cost
of metabolism) and mortality (LD 50).

Question 5

chemical water properties

Answer 5

• Water has O - very electronegative, pulls ions from hydrogen
  
  • Water has a partial positive charge at Hs and negative at O
  • The hydrogen bonding involves a polar covalent bond - also involves traction of hydrogen to look around and form an attraction with another oxygen
  • Most substances expand when heated and condense when cooled - - but water is the opposite - it has a 9% expansion when cooled

Question 6

why is water a good solvent

Answer 6

Interact well with things they can bond to/ dissolve = good solvent
• Most substances expand when heated and condense when cooled - - but water is the opposite - it has a 9% expansion when cooled
• Excellent solvent - attracted to NaCl

Question 7

water and heat storage

Answer 7

• High heat storage capacity/thermal mass is a key feature of oceans
Environment surrounding the area has more consistent temperature

Question 8

sea water major elements

Answer 8

• Sea water composition: inorganics + organics + particulates
Major elements: Chlorine, sodium, magnesium, sulfur, calcium, potassium